Perhaps you should try some spelling variations:
de lite'rature » de litterature, de literatura, e literature
stents safety » agents safety, events safety, tenth safety
safety studie » safety studies, safety study, safety stories
die filosofia » di filosofia, de filosofia, e filosofia
de literature » de litterature, de literatura, e literature
studie die » studie der

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "stents safety studie die filosofia ((de literature) OR (de lite'rature))".
• Adding a wildcard symbol may retrieve word variants: stents safety studie die filosofia ((de literature) OR (de lite'rature))*.